Carbide stone



FIG. 1 is a front perspective view of the design for a carbide stone of the invention;

FIG. 2 is a front elevational view of the carbide stone of FIG. 1;

FIG. 3 is a rear elevational view of the carbide stone of FIG. 1;

FIG. 4 is a top plan view of carbide stone of FIG. 1;

FIG. 5 is a bottom plan view of the carbide stone of FIG. 1;

FIG. 6 is a side elevational view of the carbide stone of FIG. 1; and,

FIG. 7 is an opposite side elevational view of the carbide stone of FIG. 1.

The broken lines in the drawings depict unclaimed environmental subject matter. 

CLAIM The ornamental design for a carbide stone, as shown and described. 